Nerves can be injured during blunt trauma (MVA, fall) or penetrating trauma (gunshot wound, stab wound). If the nerve is only stunned it is called a neuropraxia, and full recovery can be expected. Blunt traumas are more likely to cause neuropraxia. Transected nerves from penetrating trauma cause immediate loss of function, both muscle and sensation, and do not return unless surgically repaired.